/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hadoop.ozone.upgrade;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.apache.hadoop.hdds.upgrade.HDDSLayoutFeature;
import org.apache.hadoop.ozone.upgrade.LayoutFeature.UpgradeActionType;

/**
 * Annotation to specify upgrade action run during specific phases.
 */
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
public @interface UpgradeActionHdds {
  HDDSLayoutFeature feature();

  Component component();

  UpgradeActionType type();

  /**
   * Simple enum to denote if an action is for the SCM or the DN.
   */
  enum Component {
    SCM,
    DATANODE;
  }
}



